Beyma 605Nd

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.6dB
• Frequency response 150 - 8000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 150Hz
• Mechanical quality factor QMS 9.68
• Electrical quality factor QES 0.32
• Total quality factor QTS 0.31

Large signal parameters

• Maximum linear excursion xmax 1mm
• Air volume displaced at xmax VD 14cm³
• Power handling P 125W
• Program power Pmax 250W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.0Ω
• Inductance (1kHz) LE 0.5mH
• VC Diameter 38.5mm
• Winding height HVC 7mm

Magnet

• Force factor Bl 13.2N/A
• Motor constant Bl/√RE 5.37N/√W
• Air gap height HAG 6mm
• Material Neodymium

Diaphragm

• Effective diameter 134mm
• Effective area SD 140cm²
• Moving mass MMS 10g
• Moving mass (without air load) MMD 8.8g

Suspensions

• Stiffness KMS 10N/mm
• Compliance CMS 100µm/N
• Equivalent volume to the compliance VAS 3L
• Mechanical resistance RMS 1.1N·s/m

Dimensions

• Nominal diameter 6.5″
• 165mm
• Volume occupied by the driver (estimated) 0.61L
• Net weight 1.5kg